MUD MIXER MMXR-3221 Use and care manual

OWNERS MANUAL &
ASSEMBLY INSTRUCTIONS
MIXING MUD HAS NEVER BEEN THIS EASY...
OR THIS CLEAN!
MudMixer • Model MMXR-3221

This machine is designed primarily for mixing and distributing bagged concrete
and/or mortar products, and is intended for use by contractors, landscapers, fence
builders, and residential homeowners in completing professional and DIY projects.
Read this information carefully to learn how to operate and
maintain your product properly and to avoid injury and product damage.
You are responsible for operating the product properly and safely.
You may contact MudMixer directly at www.MudMixer.com for
product safety and operation training materials, accessory information,
help finding a dealer, or to register your product.
Whenever you need service, genuine MudMixer parts, or additional information,
contact an Authorized Service Dealer or MudMixer Customer Service
and have the model and serial numbers of your machine ready.
IMPORTANT: With your mobile device, you can scan the QR code on the
rear electrical box to access warranty, parts, and other product information.

Safety & Specs.................................................................................................................... 1
Parts & Hardware List ......................................................................................................... 1
Assembly Instructions......................................................................................................... 2
Assembly Video (via QR code)............................................................................................. 3
Operating Instructions ........................................................................................................ 5
Maintenance Schedule ....................................................................................................... 6
Maintenance Warranty........................................................................................................ 7
This manual identifies potential hazards and has safety messages identified
by the safety-alert symbol (Figure 2), which signals a hazard that may cause
serious injury or death if you do not follow the recommended precautions.
Publication Date: 10/2022
Figure 2
Safety-alert symbol
TABLE OF CONTENTS

MudMixer MMXR-3221
Machine Overview
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mudmixer.com
Model MMXR-3221 (10/2022)
Concrete Bag Cutter
Water Control Dial
Power Switch
Grounded Power Cable
Flat Free Tire
Chute Auger Guard
Auger (inside chute)
Hopper
T-Valve
Secondary Hose
Chute
1. Open the QR Code reader on your smartphone.
2. Hold your device over the QR Code so it’s clearly visible within your smartphone’s screen. Your
phone will automatically scan the code and prompt you to open a browser window. (It may take
a few seconds on some devices. Some QR Code readers may require you to press the button to
take a picture of the code.) After your smartphone reads the code, it will navigate to the online video.
3. PRESS PLAY on the video.
View 1 View 2
View 3
Hopper Auger Guard
(inside Hopper)
see View 3 below

2
mudmixer.com (10/2022) Model MMXR-3221
MudMixer MMXR-3221
Manual Part Number: MMXR-P316
DETAILS
Overall Length 66.5 in.
Overall Width 22.5 in.
Overall Height 35 in.
Chute Height 16 in.
Weight 145 lbs.
Hopper Capacity 120 lbs.
Body Construction 14 Gauge High-Strength Steel
Frame Construction 1 in. Steel Pipe
Tires Marathon Flat-Free
ELECTRICAL
Electrical Requirements 120-volt
Cord Length 36 in.
Running Amps 1.6
MOTOR
Motor HP ½ HP
Motor Protection Rating IP55
SAFETY FEATURES
Hopper Auger Guard
Chute Auger Guard
Grounded Power Cable with GFCI
Water-tight electrical boxes and connections
PARTS LIST - MUDMIXER MODEL MMXR-3221
A MudMixer - Body
B MudMixer - Frame
C MudMixer - Frame Handle
D Auger Guard - Chute
E Auger Guard - Hopper
F Base Plate
G Circular Pivot Bushing
H Wheel Axle
I Flat-Free Wheels
HARDWARE PACKAGE LIST
J M10 x 50 Bolts, Washers & Nuts (6)
K Axle Washer Pin (2)
L Axle Washer (2)
M Base Plate Small Washers (2)
N Base Plate Spring (1)
O Base Plate Nut (1)
P Base Plate M14 x 65 Bolt (1)
Q Base Plate Big Washer (1)
A
BC F I
D
E
Hardware magnified and
labeled in inset above
H
J
P
K
N
O
ML
Q
G

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mudmixer.com
Model MMXR-3221 (10/2022)
MudMixer MMXR-3221
Assembly Instructions •Steps 1 - 3a
STEP 1
STEP 3a STEP 3b
STEP 2
STEP 4 & 5
Tools Needed: 1.) Channel Locks 2.) 5/8” Wrench 3.) 7/8” Wrench
Visit: mudmixer.com/videos
to learn more about your MudMixer!
Lay (A) MudMixer upside down on provided cardboard cover
Secure (F) base plate to mixer via (Q) large washer, (M) small washer
(2), (N) spring, and (O) nut
Lay (G) bushing on mixer base, webbing up
Secure (B) frame to base plate via
(J) bolts, nuts, and washers (4)
Attach (C) frame handle to
frame via (J) bolts, nuts, and
washers (2)

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mudmixer.com (10/2022) Model MMXR-3221
MudMixer MMXR-3221
Assembly Instructions •Steps 3b - 4
PAGE 2 HARDWARE (BASE PLATE PARTS M-Q)
J
M10 x 50 Bolts,
Washers &
Nuts (6)
MSmall Washers (2)
NSpring (1)
ONut (1)
KAxle Washer Pin (2) PM14 x 65 Bolt (1)
LAxle Washer (2) QBig Washer (1)
J
P
K
N
O
ML
Q
Attach MudMixer (I) tires to frame via (H) axle,
(K) pins, and (L) washers
Pivot the mixer 90 degrees and use the handle to flip the mixer into the upright
position
Pivot mixer 90 degrees to secure pivot latch
STEP 6a
STEP 6b
STEP 7
STEP 8

1. Ensure installation of both Safety Auger Guards (Hopper and Chute).
2. Connect garden hose (Min 40PSI recommended) to T-Valve.
3. Connect the Grounded Power Cable to power.
4. Set the Water Control Dial to desired starting point (35 - 50 recommended for concrete).
5. Flip the Power Switch to “Forward” for 5 seconds to test the water and Auger.
6. Pre-wet the Chute using the Secondary Hose.
7. Using the Concrete Bag Cutter, place the first bag of powder into the Hopper.
8. Flip the Power Switch to “Forward” to begin mixing concrete.
9. Adjust Water Control Dial to achieve desired slump.
10. Continue to add bags as necessary, keeping the Hopper 3/4 or more full.
11. Utilize the Secondary Hose to:
• Increase water delivery when necessary
• Thoroughly clean the unit when finished
12. THOROUGHLY CLEAN THE HOPPER, CHUTE, and AUGER WITH PROVIDED SPRAY NOZZLE WITHIN 20 MINUTES OF
COMPLETING MIXING PROCESS
DO NOT SPRAY WATER DIRECTLY
ONTO OR INTO THE MOTOR
MudMixer MMXR-3221
Operating Instructions
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mudmixer.com
Model MMXR-3221 (10/2022)

General Cleaning
• After using the MudMixer, it is absolutely necessary to clean the unit thoroughly.
• We recommend using the MudMixer Secondary Hose and a rag to ensure the unit is free of
concrete residue of any kind after the end of each project.
Motor Cleaning
• Use a rag to wipe the motor clean if necessary.
• DO NOT SPRAY WATER DIRECTLY ONTO OR INTO THE MOTOR.
Wheel Maintenance
• Use the grease ports on the wheels to grease the wheels when necessary.
Solenoid Maintenance
• If unused for more than 6 months, disassemble solenoid for cleaning to prevent internal rust.
• COLD WEATHER WARNING: To prevent bursting components, ensure all water is removed from
plumbing system if temperature will drop below 32°F.
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mudmixer.com (10/2022) Model MMXR-3221
MudMixer MMXR-3221
Maintenance Schedule
WARNING - DO NOT CLEAN
THE MIXER WHILE IT IS
HOOKED TO ELECTRICITY
DO NOT SPRAY WATER
DIRECTLY ONTO OR INTO
THE MOTOR

The MudMixer® Company promises to repair the MudMixer® product if it is defective in materials or workmanship for the period
listed below.
One Year for any unit used for any purpose including personal, family, or household use, rental, or commercial.
This warranty extends to the original retail purchaser only and commences on the date of the original retail purchase.
Any part of this product manufactured or supplied by MudMixer® and found in the reasonable judgment of the MudMixer® Company
to be defective in material or workmanship will be repaired or replaced without charge for parts and labor by the MudMixer®
company or an authorized dealer.
The product, including any defective part, must be returned to the MudMixer® company or an authorized MudMixer® dealer within
the warranty period. The expense of delivering the product to the dealer for warranty work and the expense of returning it back to
the owner after repair or replacement will be paid by the owner. The MudMixer® company’s responsibility with respect to claims
is limited to making the required repairs or replacements and no claim of breach of warranty should be cause for cancellation or
rescission of the contract of any MudMixer® brand product. Proof of purchase will be required by the dealer to substantiate any
warranty claim before warranty work must be performed by the MudMixer® company.
This warranty is limited to 365 days from the date of original retail purchase for any MudMixer® brand product that is used for rental
or commercial purposes, or any other income producing purpose.
This warranty does not cover any MudMixer® brand product that has been subject to misuse, neglect, negligence, or accident,
or that has been operated in any way contrary to the operating instructions as specified in the operator’s manual. This warranty
does not apply to any damage to the product that is the result of improper maintenance or to any product that has been altered or
modified. The warranty does not extend to repairs made necessary by normal wear or by the use of parts or accessories which are
either incompatible with the MudMixer® product or adversely aect its operation, performance, or durability.
The MudMixer® company reserves the right to change or improve the design of any MudMixer® brand product without assuming any
obligation to modify any product previously manufactured.
The warranty applies only if you perform the routine maintenance specified in the Operator’s Manual. MudMixer® makes no other
express warranty.
ALL IMPLIED WARRANTIES ARE LIMITED IN DURATION TO THE STATED WARRANTY PERIOD. ACCORDINGLY, ANY SUCH
IMPLIED WARRANTIES INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR OTHERWISE, ARE
DISCLAIMED IN THEIR ENTIRETY AFTER THE EXPIRATION OF THE APPROPRIATE ONE YEAR OR NINETY DAY WARRANTY
PERIOD. MUDMIXER’S OBLIGATION UNDER THIS WARRANTY IS STRICTLY AND EXCLUSIVELY LIMITED TO THE REPAIR OR
REPLACEMENT OF DEFECTIVE PARTS AND MUDMIXER DOES NOT ASSUME OR AUTHORIZE ANYONE TO ASSUME FOR THEM
ANY OTHER OBLIGATION. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE
ABOVE LIMITATION MAY NOT APPLY TO YOU. MUDMIXER ASSUMES NO RESPONSIBILITY FOR INCIDENTAL, CONSEQUENTIAL,
OR OTHER DAMAGES INCLUDING BUT NOT LIMITED TO, EXPENSE OF RETURNING THE PRODUCT TO THE MUDMIXER COMPANY
OR AN AUTHORIZED MUDMIXER SERVICE CENTER OR EXPENSE OF DELIVERING IT BACK TO THE OWNER, MECHANICS TRAVEL
TIME, TELEPHONE CHARGES, RENTAL OF A PRODUCT DURING THE TIME WARRANTY SERVICE HAS BEEN PERFORMED,
TRAVEL, LOSS OR DAMAGE TO PERSONAL PROPERTY LOSS OF REVENUE, LOSS OF USE OF THE PRODUCT, LOSS OF TIME,
OR INCONVENIENCE. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL
DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.
For additional questions regarding warranty terms and conditions, you may contact the MudMixer® Company at:
MudMixer®
www.mudmixer.com | [phone]
MudMixer MMXR-3221
Warranty Information
7
mudmixer.com
Model MMXR-3221 (10/2022)

REGISTER YOUR
MUDMIXER
Within 30 days of your purchase, register your
product to activate your warranty and
receive a free gift!
Go to mudmixer.com/warranty or scan the
QR code below to get started.
mudmixer.com |1-806-515-4MUD
FREE
GIFT
when you register!